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Electromagnetic Waves 8th Grade
  • 1. Global Positioning System signals can tell you
A) what television station you are tuned to
B) your exact location on Earth
C) how many satellites are in orbit
D) who is sending a message to your cellphone
  • 2. Which waves have some electrical properties and some magnetic properties?
A) mechanical waves
B) transverse waves
C) electromagnetic waves
D) longitudinal waves
  • 3. Electromagnetic waves can transfer energy without a(n)
A) change in either a magnetic or an electric field
B) medium
C) magnetic field
D) electric field
  • 4. The range of electromagnetic waves placed in a certain order is called the
A) electromagnetic field
B) electromagnetic frequency
C) electromagnetic wavelength
D) electromagnetic spectrum
  • 5. Which model of light helps explain the photoelectric effect?
A) the electromagnetic model
B) the wave model
C) the particle model
D) the polarizing model
  • 6. FM signals travel as changes in
A) the loudness of the wave
B) the amplitude of the wave
C) the frequency of the wave
D) the speed of the wave
  • 7. On AM broadcasts, what remains constant?
A) the music
B) the frequency
C) the speech
D) the amplitude
  • 8. Which electromagnetic waves have the longest wavelengths and lowest frequencies?
A) ultraviolet waves
B) radio waves
C) infrared waves
D) gamma rays
  • 9. Light that has passed through a polarizing filter is called
A) transverse light
B) white light
C) photoelectric light
D) polarized light
  • 10. Visible light can be separated into various colors to form a(n)
A) thermogram
B) spectrum
C) X-ray picture
D) MRI
  • 11. What kind of waves do cellular telephones use to transmit and receive signals?
A) microwaves
B) gamma rays
C) infrared rays
D) ultraviolet rays
  • 12. The images made by an infrared camera are called
A) thermograms
B) ultraviolet images
C) magnetic resonance images
D) X-rays
  • 13. In the phenomenon known as the _________, electric current will flow when light shines on certain substances.
A) electromagnetic spectrum
B) photoelectric effect
C) electricity
D) electromagnetism
  • 14. Which letter shows the type of wave that can be seen by the human eye?
A) B
B) D
C) C
D) A
  • 15. What is the name of the type of wave labeled C?
A) ultraviolet rays
B) infrared rays
C) radar
D) visible light
  • 16. Which letter indicates X-rays?
A) C
B) B
C) A
D) D
  • 17. What type of wave that has the highest frequency?
A) gamma rays
B) microwave
C) x-rays
D) infrared rays
  • 18. What type of wave that has the the greatest energy?
A) infrared rays
B) microwave
C) x-rays
D) gamma rays
  • 19. What type of wave is labeled A?
A) infrared
B) radio
C) visible light
D) ultraviolet
  • 20. What is the object labeled as A?
A) ground receiver
B) radio waves
C) communications satellite
D) ground transmitter
  • 21. What is the object labeled B?
A) ground transmitter
B) communications satellite
C) radio waves
D) ground receiver
  • 22. What is the object labeled C?
A) radio waves
B) ground transmitter
C) ground receiver
D) communications satellite
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